[V6-12v] 96 A6 ISV and idle issues

[George Tur]

On Thursday 21 December 2006 08:30, Eric Huppert wrote:
> Gentlemen,
>
sniped stuff ...
>
> Pulled ISV and cleaned. Getting 8.3 ohms resistance on valve, so tests
> okay. I'm a type 44 guy, so not too familiar with the workings of this
> model and don't have one to compare to. Does the entire metal cylinder
> move, or just the internal mechanism? Internal piece moves, but metal cyl
> isn't budging. Pryed etc gently, but not moving... Should it???
>
> Cleaned ISV elec connection
>
> Pulled plugs, cleaned holes, checked continuity of wires and cleaned all
> connections. Plugs looked a little carboned up, as in rich...
>
> Thoughts, ideas, BTDT?
>
No idea how the ISV works on this car.

But, if the plugs are carboned up then check the oxygen sensor(s). They might 
be sending a low/high (?) signal which is causing the ecu to run rich. That's 
what happened to my V8. The oxygen sensor didn't die, but was sending a 
signal at the extreme end of whatever voltage range it's checking and caused 
a rich running condition.

Good luck